Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so safety is covered. The description adds value on top by disclosing what the listing actually contains (status, budget vs. spend, key/app counts per project), which is behavioral context an agent can use to decide whether this call answers its question. It stops short of mentioning pagination or result size limits.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, no filler. The payload of the listing is front-loaded and the downstream-use hint follows immediately.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

There is no output schema and no annotations about return shape, so the description must carry that burden — and it does, naming the fields returned per project. Missing is any note about ordering, pagination, or how many projects are returned, which a listing tool would ideally address.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool takes zero parameters, so there is nothing for the description to disambiguate; the baseline for a parameter-less tool applies. The description usefully notes the listing is scoped to 'this account', which is the only implicit input dimension.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states the resource (projects in this account) and enumerates the returned fields (name, status, budget and spend, key/app counts), which makes the tool's scope unambiguous. It does not explicitly contrast itself with the sibling get_project, which returns a single project, so it falls just short of full sibling differentiation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives a concrete when-to-use: obtaining the projectId needed by create_key or deploy_app, which is exactly the kind of routing an agent needs. It omits any when-not guidance (e.g., use get_project for one project's detail), so the coverage is clear but not exhaustive.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.